In this doctoral thesis, Kant's distinction between perfect and imperfect duties is examined. The thesis begins with an exploration of how the distinction originates and evolves in the writings of three of Kant's most prominent natural law predecessors: Hugo Grotius, Samuel von Pufendorf, and Christian Wolff. The thesis then moves on to Kant's own writings. It is argued that Kant draws the perfect-imperfect distinction in as many as twelve different ways, that these ways are not entirely consistent with one another, and that many of them, even taken by themselves, do not hold up to scrutiny. Furthermore, it is argued that Kant's claim that perfect duties always trump imperfect duties - which can be referred to as "the priority claim" - is not actually supported by any one of the ways in which Kant draws the perfect-imperfect distinction. After this critical reading of Kant's writings, the thesis then switches gears and a more "positive" project is attempted. It is argued that the perfect-imperfect distinction, even though it does not support the priority claim, is not altogether normatively neutral or uninteresting. In particular, for some of the ways in which the distinction is drawn, it is shown that the distinction yields the following normative implication: Sometimes perfect duties override imperfect duties and all other times there is no priority one way or the other. Finally, it is explained that this normative implication - which can be referred to as the "privilege claim" - translates into the following practical directive: When there is a conflict between a perfect duty and an imperfect duty, sometimes one must act in conformity with the former duty and all other times one is free to choose which of the two duties to act in conformity with. This practical directive represents the ultimate finding of this thesis.

This diploma thesis deals with the Aristotelian virtue ethics and its renaissance in the twentieth century. Ethics is first defined generally as a separate science which belongs to the practical sciences. Subsequently, the emphasis on virtue ethics as one of the directions of normative ethics. A key part of the thesis deals with the ethics of virtue in Aristotle and interpretation corresponding more or less to the interpretation of the work of Nicomachean Ethics. The emphasis is on concepts of virtue, bliss and goodness. The development of u virtue ethics from the time of Aristotle until the twentieth century is also mentioned. The last part deals with the form of virtue ethics in the twentieth century, including the process how the ethics of virtue acquired its present form. It is also compared to the interpretation of virtue ethics in Aristotle and in the works of modern moral philosophers, particularly the work of Alasdair MacIntyre After Virtue is emphasized.

A Sceptical Aesthetics of Existence: The Case of Michel Foucault Emmanouil Simos (Hughes Hall) Michel Foucault's genealogical investigations constitute a specific historical discourse that challenges the metaphysical hypostatisation of concepts and methodological approaches as unique devices for tracking metaphysically objective truths. Foucault's notion of aesthetics of existence, his elaboration of the ancient conceptualisation of ethics as an 'art of living' (a technē tou biou), along with a series of interconnected notions (such as the care of the self) that he developed in his later work, have a triple aspect. First, these notions are constitutive parts of his later genealogies of subjectivity. Second, they show that Foucault contemplates the possibility of understanding ethics differently, opposed to, for example, the traditional Kantian conceptualisation of morality: he envisages ethics in terms of self-fashioning, of aesthetic transformation, of turning one's life into a work of art. Third, Foucault employs these notions in self-referential way: they are considered to describe his own genealogical work. This thesis attempts to show two things. First, I defend the idea that the notion of aesthetics of existence was already present in a constitutive way from the beginning of his work, and, specifically, I argue that it can be traced in earlier moments of his work. Second, I defend the idea that this notion of aesthetics of existence is best understood in terms of the sceptical stance of Sextus Empiricus. It describes an ethics of critique of metaphysics that can be understood as a nominalist, contextualist, and particularist stance. The first chapter discusses Foucault's late genealogy of the subject. It formulates the interpretative framework within which Foucault's own conceptualisation of the aesthetics of existence can be understood as a sceptical stance, itself conceived as nominalist, contextualist and particularist. As the practice of an aesthetics of existence is not abstract and ahistorical but the engagement with the specific historical circumstances within which this practice is undertaken, the second chapter reconstructs the intellectual context from which Foucault's thought has emerged (Heidegger, Blanchot, and Nietzsche). The third chapter discusses representative examples of different periods of Foucault's thought -such as the "Introduction" to Binswanger's "Traum und Existenz" (1954), Histoire de la folie (1961), and Histoire de la sexualité I. La volonté de savoir (1976)- and shows in which way they constitute concrete instantiations of his sceptical aesthetics of existence. The thesis concludes with responses to a number of objections to the sceptical stance here defended.

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